Nortel BayStack 450-24T - Chapter 4 Troubleshooting; Interpreting the LEDs

309978-D Rev 01 4-1
Chapter 4
Troubleshooting
This chapter describes how to isolate and diagnose problems with your
BayStack 450 switch.
This chapter covers the following topics:
• “Interpreting the LEDs” (page 4-1)
• “Diagnosing and Correcting the Problem” (page 4-5)
• “Software Download Error Codes” (page 4-9)
The chapter topics lead you through a logical process for troubleshooting the
BayStack 450 switch. For example, because LEDs provide visual indications of
certain problems, refer to
“Interpreting the LEDs” on page 4-1 to understand the
various states (see Table 4-1) that your switch LEDs can exhibit during normal
operation.
For more help in determining the problem, “Diagnosing and Correcting the
Problem” on page 4-5 describes symptoms and corrective actions (see Table 4-2)
you can perform to resolve specific problems. Subsequent sections give
step-by-step procedures to correct the problems.
Interpreting the LEDs
Figure 4-1 shows the BayStack 450-24T and BayStack 450-12T LED display
panels. Figure 4-2 shows the BayStack 450-12F LED display panel.
Note: The LED Display panel configuration for your switch may be different
than shown in this section, depending on the date of manufacturing (see the
note in
“10BASE-T/100BASE-TX Ports” on page 1-4).